US4584334A - Polyphenylene ether resin compositions containing linear low density polyolefin - Google Patents

Polyphenylene ether resin compositions containing linear low density polyolefin Download PDF

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US4584334A
US4584334A US06585766 US58576684A US4584334A US 4584334 A US4584334 A US 4584334A US 06585766 US06585766 US 06585766 US 58576684 A US58576684 A US 58576684A US 4584334 A US4584334 A US 4584334A
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density
ether
polyphenylene
polyethylene
low
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US06585766
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Gim F. Lee, Jr.
Sai P. Ting
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General Electric Co
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General Electric Co
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/04Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L71/00Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
    • C08L71/08Polyethers derived from hydroxy compounds or from their metallic derivatives not used
    • C08L71/10Polyethers derived from hydroxy compounds or from their metallic derivatives not used from phenols not used
    • C08L71/12Polyphenylene oxides
    • C08L71/123Polyphenylene oxides not modified by chemical after-treatment
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L81/00Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen or carbon only; Compositions of polysulfones; Compositions of derivatives of such polymers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S525/00Synthetic resins or natural rubbers -- part of the class 520 series
    • Y10S525/905Polyphenylene oxide

Abstract

Thermoplastic blends of polyphenylene ether resin and linear low density polyethylene, optionally containing an impact modifier, are described. The moldings are characterized by good physical properties, including superior impact strength, in comparison with corresponding blends containing conventional (i.e., highly branched) low density polyethylene.

Description

This is a continuation of application Ser. No. 362,305 filed Mar. 26, 1982, abandoned.

BACKGROUND OF THE INVENTION

The polyphenylene ether resins constitute a family of high performance engineering thermoplastics possessing outstanding properties which makes them useful and desirable for many applications. These materials and methods for their preparation are described in many publications, including U.S. Pat. Nos. 3,306,874 and 3,306,875 to Allan Hay, and U.S. Pat. Nos. 3,257,357 and 3,257,358 to Gelu Stamatoff.

It is well known that the properties of polyphenylene ether resins can be materially upgraded by blending them with other polymeric materials. Polyphenylene ether resins alone, when molded, are somewhat brittle and may shatter or fracture upon impact. Also, the relatively high melt viscosity and softening point of the polymer can cause difficulty in processing. Lee, Jr. in U.S. Pat. No. 4,166,055 discloses blends of polyphenylene ether resin and polyolefin possessing good melt flow properties during molding and good impact strength after molding.

INTRODUCTION TO THE INVENTION

The discovery has now been made that a certain family of materials known in the art as linear low density polyethylene (LLDPE), when incorporated in polyphenylene ether resin and blends of polyphenylene ether resin, results in better impact strength than corresponding compositions modified with conventional highly branched low density polyethylene (LDPE), while maintaining essentially equivalent other physical properties.

DESCRIPTION OF THE INVENTION

The polyphenylene oxide resins useful in accordance with the present kinds of compositions are, as previously indicated, individually well known and readily available. There are, however, various preferred compositions components. These are primarily ones commonly having applications for which high impact strength is particularly desirable.

The preferred polyphenylene ethers are homo- and copolymers of the formula: ##STR1## wherein Q, Q', Q" and Q"', are independently selected from the group consisting of hydrogen, hydrocarbon radicals, halohydrocarbon radicals having at least two carbon atoms between the halogen atom and the phenol nucleus, hydrocarbonoxy radicals and halohydrocarbonoxy radicals having at least two carbon atoms between the halogen atoms and the phenol nucleus, and Q', Q" and Q"' in addition may be halogen with the proviso that Q and Q' are preferably free of a tertiary carbon atom; and n represents the total number of monomer residues and is an integer of at least 50.

Especially preferred is poly(2,6-dimethyl-1,4-phenylene) ether.

The polyphenylene ether resin may be prepared by well known procedures, such as those described in the previously mentioned patents.

The polyphenylene ether resin is preferably but not necessarily in admixture with one or more polymeric impact modifiers. The impact modifier can be a styrene homopolymer in admixture or otherwise modified with an elastomeric material such as a natural or synthetic rubber, or a styrene containing elastomeric copolymer or terpolymer.

By way of illustration, the impact modifier may be a homopolymer such as polystyrene, polychlorostyrene, poly(alpha-methyl styrene), poly(para-methylstyrene), or styrene copolymer which has been modified by natural or synthetic rubber, for example, polybutadiene, polyisoprene, butyl rubber, EPDM rubber, natural rubber, polysulfide rubbers, polyurethane rubbers, etc., elastomeric styrene copolymers, e.g., styrene-butadiene copolymers and rubber modified styrene-maleic anhydride copolymers, styrene-acrylo-nitrile butadiene terpolymers (ABS), block copolymers of styrene and a diene in their various forms, for example, A-B, A-B-A, A-B-AB, A-B-A-B-A, etc., random or radial teleblock copolymers of these same materials, as well as hydrogenated forms of the linear, random or radial copolymers in which the aliphatic unsaturation, e.g., of the "B" (diene) block has been reduced; and admixtures of any of the above mentioned styrene homopolymers with any of the above mentioned styrene co- and terpolymers.

The linear low density polyolefins used in the present kinds of compositions are well known materials exemplified by linear low density polyethylene (LLDPE). These may be prepared from procedures described in publications, for example, in U.S. Pat. No. 4,076,698 to Arthur Anderson and Gelu Stamatoff and European Pat. Appl. No. 4,645. They are characterized by a density between about 0.89 and 0.96 gms/cc and a controlled concentration of simple side chain branching which distinguishes them from other polyolefins such as high pressure low density polyethylene and high density polyethylene prepared with Ziegler catalyst systems.

The preferred LLDPE copolymers are made from ethylene and one or more alpha olefins selected from among propylene, butene-1, heptene-1, 4-methyl, pentene-1 and octene-1. The preferred copolymers have a melt index of ≧0.1 to ≦40.

Especially preferred are LLDPE copolymers having a density between about 0.915 and 0.945. The density of the copolymer, at a given melt index level, is primarily regulated by the amount of the alpha-olefin monomer copolymerized with ethylene. In general, a greater content of the alpha-olefin comonomer results in a lower density for the copolymer.

The preferred copolymers have an unsaturated group content of ≦1 and preferably ≧0.1 to ≦0.3, C═C/1000 carbon atoms and a n-hexane extractables content (at 50° C.) of less than about 3 and preferably less than 2 weight percent. The preferred materials are made by the Unipol process, which is described in Chem. Eng., Dec. 3, 1979, pp. 80-85.

In preferred embodiments, the polyolefin is present in an amount from 0.5 to 5 parts by weight, based on the total weight of the composition.

The polyphenylene ether resin and impact modifier may be present in widely variant relative proportions, for instance, from 20.1 to 1:20, and more usually, from 4:1 to 1:2.

The compositions can also contain supplementary non-resinous additives customarily employed in polyphenylene ether molding compositions to improve other physical and chemical properties. The additives include flame retardants, plasticizers, strengthening fibers (for example, glass filaments and graphite whiskers), antioxidants, mold release agents, mineral fillers, pigments, dyes, abrasion resistant components, etc. These are typically included in minor but effective amounts of between 1% and 50% by weight of the total composition.

Preparation of the compositions is accomplished by use of any of the known procedures for polyphenylene ether molding compositions, e.g., such as described in U.S. Pat. No. 4,166,055. Preferably, the ingredients are formed into a blend pre-mix, extruded as on a single or twin screw extruder, cooled, chopped or ground into molding pellets and injection molded into articles of the desired shape and size.

The following examples are presented as an illustration of the invention. These are intended as specific embodiments only and not as a limitation on the scope of the invention. Proportions are stated in parts by weight.

EXAMPLES

A composition according to the invention was prepared by tumbling 55 parts of poly(2,6-dimethyl-1,4-phenylene ether) resin (General Electric's PPO®), 45 parts of rubber modified high impact polystyrene (Foster Grant's 834, containing about 9%, polybutadiene rubber), 1.5 parts of linear low density polyethylene (Union Carbide's GRSN-7241), 1.0 part of diphenyl decyl phosphite, 3.5 parts of isopropylated triphenyl phosphate liquid flame retardant agent (FMC's Kronitex®50), 0.15 part of zinc oxide and 0.15 part of zinc sulfide. The resultant blend was extruded through a 28 mm Werner-Pfleiderer twin screw extruder at 570° F., cooled, chopped and the pellets were injection molded at 540° F. (180° F. mold temperature) into test bars. The physical properties are noted below.

For purposes of comparison, a control composition containing the same ingredients in the same amounts, except no polyethylene, was also prepared, molded and tested under the same conditions. In addition, a corresponding composition in which the LLDPE was replaced with the same amount of a highly branched low density polyethylene (Rexene 126) was also prepared, molded and tested. The results for these are also noted below.

                                  TABLE__________________________________________________________________________Sample No. PE   HDT Izod             Gardner                  MV T.S.                        T.Y.                           T.E.                              F.M.                                 F.S.                                    F.C.__________________________________________________________________________1*    --   249 2.9              60  2600                     8.3                        9.9                           42 390                                 15.2                                    10.52**   LDPE 249 3.7             108  2700                     8.6                        9.6                           72 372                                 14.6                                    113     LLDPE      249 3.7             150  2900                     8.6                        9.7                           66 376                                 14.6                                    11__________________________________________________________________________ *control experiment **comparison experiment HDT = heat distortion temperature, °F. Izod = Izod impact strength, ft.lbs./in. of notch Gard. = Gardner impact strength, in.lbs. MV = melt viscosity, poise at 282° C., 1500 T.S. = tensile strength, psi × T.Y. = tensile yield, psi × T.E. = tensile elongation, % F.M. = flexural modulus, psi × F.S. = flexural strength, psi × F.C. = flow channel length of injection sample, inches

It can be seen that the linear low density polyethylene (sample 3) results in a much greater increase in the Gardner impact strength, while the other properties are at least comparable to those achieved with the highly branched low density polyethylene.

The above mentioned patents and/or publications are incorporated herein by reference. Obviously, other modifications and variations are possible in light of the above disclosure. For instance, instead of poly(2,6-dimethyl-1,4-phenylene ether), copolymers such as poly(2,6-dimethyl-co-2,3,6-trimethyl-1,4-phenylene ether) can be substituted. Instead of a rubber modified high impact polystyrene such as FG834, other modifiers such as rubber modified styrene-maleic anhydride copolymer can be used. It is to be understood, therefore, that changes may be made in the particular embodiments shown which are within the full intended scope of the invention as defined in the appended claims.

Claims (10)

We claim:
1. A thermoplastic molding composition, comprising an admixture of
(a) a polyphenylene ether resin together with a rubber modified polystyrene; and
(b) an amount of linear low density polyethylene sufficient to provide a higher Gardner impact strength than the same amount of a low density polyethylene.
2. A composition according to claim 1, in which the linear low density polyethylene has a density between 0.89 and 0.96 grams per cubic centimeter.
3. A composition according to claim 1, in which the linear low density polyethylene comprises a copolymer of ethylene and one or more alpha olefins.
4. A composition according to claim 3, in which the copolymer is of ethylene and one or more alpha olefins selected from propylene, butene-1, heptene-1, 4-methyl pentene-1 and octene-1.
5. A composition according to claim 3, in which the copolymer of ethylene and alpha-olefins has a melt index of ≧0.1 to ≦40.
6. A composition according to claim 1, which comprises an admixture of the polyphenylene ether resin and the rubber modified polystyrene in a weight ratio between 20:1 and 1:20.
7. A composition according to claim 6, which comprises an admixture of the polyphenylene ether resin and the rubber modified polystyrene in a weight ratio between 4:1 and 1:2.
8. A composition according to claim 1, in which the linear low density polyethylene is present in an amount of from 0.5 to 5 parts by weight of the total composition.
9. A composition according to claim 1, which includes a flame retardant.
10. A composition according to claim 9, in which the flame retardant is triphenyl phosphate.
US06585766 1982-03-26 1984-03-02 Polyphenylene ether resin compositions containing linear low density polyolefin Expired - Lifetime US4584334A (en)

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Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0326895A2 (en) * 1988-02-03 1989-08-09 General Electric Company Compatibilized thermoplastic blends of polyphenylene ether and polyolefin
EP0362660A2 (en) * 1988-10-06 1990-04-11 General Electric Company Improved polyphenylene ether resin compositions which are highly resistant to delamination
EP0413972A2 (en) * 1989-08-18 1991-02-27 General Electric Company Improved thermoplastic compositions which contain polyolefins and polyphenylene ethers, and articles made therefrom
US5296540A (en) * 1989-10-06 1994-03-22 Asahi Kasei Kogyo Kabushiki Kaisha Shaped resin article comprising polyphenylene ether
US5389320A (en) * 1991-10-28 1995-02-14 General Electric Company Method of making expandable polyphenylene ether and polyolefin blend
US5461096A (en) * 1991-12-31 1995-10-24 General Electric Company Polyphenylene ether resin-containing compositions containing high molecular weight polyethylene resin
US6113822A (en) * 1998-12-23 2000-09-05 General Electric Company Polyolefins as nucleating agent for foamed engineering polymers
US6316592B1 (en) 2000-05-04 2001-11-13 General Electric Company Method for isolating polymer resin from solution slurries
US6414084B1 (en) 2000-04-13 2002-07-02 General Electric Company High flow polyphenylene ether formulations with dendritic polymers
US6544540B2 (en) 1998-07-29 2003-04-08 Syngenta Limited Base-triggered release microcapsules
US6576700B2 (en) 2000-04-12 2003-06-10 General Electric Company High flow polyphenylene ether formulations
US6608166B2 (en) 2001-08-30 2003-08-19 General Electric Company Three-dimensional copolymers of polyphenylene ether resinsand sytrenic resins
US6620885B2 (en) 2001-08-30 2003-09-16 General Electric Company Copolymers of functionalized polyphenylene ether resins and blends thereof
US20040059042A1 (en) * 2002-09-20 2004-03-25 Hartle Thomas J. Underhood components
US20040102551A1 (en) * 2002-11-14 2004-05-27 Sho Sato Resin composition for wire and cable covering material
US20040122170A1 (en) * 2002-12-19 2004-06-24 Mhetar Vijay R. Poly(arylene ether) composition
WO2004052992A1 (en) * 2002-12-10 2004-06-24 General Electric Company Polyphenylene ether compositions with improved die lip buidup performance
US6784234B2 (en) 1998-10-07 2004-08-31 General Electric Company High performance plastic pallets
US20040171733A1 (en) * 2003-02-28 2004-09-02 Kim Balfour Poly(arylene ether) compositions
US6794450B2 (en) 2002-03-06 2004-09-21 General Electric Company High flow compositions of compatibilized poly(arylene ether) polyamide blends
US20050075472A1 (en) * 2003-10-03 2005-04-07 Yeager Gary William Composition comprising functionalized poly(arylene ether) and ethylene-alkyl (meth)acrylate copolymer, method for the preparation thereof, and articles prepared therefrom
US20050154100A1 (en) * 2004-01-07 2005-07-14 Kazunari Kosaka Flexible poly(arylene ether)composition and articles thereof
US20050202100A1 (en) * 2004-03-11 2005-09-15 Maria Dekkers Josephus H.C. Biocidal compositions and methods of making thereof
US20050203237A1 (en) * 2004-03-11 2005-09-15 Cornelius Maria Dekkers Josephus H. Biocidal compositions and methods of making thereof
US20050228077A1 (en) * 2004-03-31 2005-10-13 Alger Montgomery M Method of making poly(arylene ether) compositions
US20050288402A1 (en) * 2004-04-01 2005-12-29 Kazunari Kosaka Flame retardant composition
US20060106139A1 (en) * 2004-04-01 2006-05-18 Kazunari Kosaka Flame retardant thermoplastic composition and articles comprising the same
US20060135695A1 (en) * 2004-12-17 2006-06-22 Hua Guo Flexible poly(arylene ether) composition and articles thereof
US20060131050A1 (en) * 2004-12-17 2006-06-22 Mhetar Vijay R Covering for conductors
US20060135661A1 (en) * 2004-12-17 2006-06-22 Mhetar Vijay R Flexible poly(arylene ether) composition and articles thereof
US20060131059A1 (en) * 2004-12-17 2006-06-22 Xu James J Multiconductor cable assemblies and methods of making multiconductor cable assemblies
US20060175325A1 (en) * 2005-02-08 2006-08-10 Day Eric D Impact modified polyester and vinylalcohol copolymer blend and molded fuel tank thereof
US7220917B2 (en) 2004-12-17 2007-05-22 General Electric Company Electrical wire and method of making an electrical wire
US20070261878A1 (en) * 2004-04-01 2007-11-15 General Electric Company Flame retardant thermoplastic composition and articles comprising the same
US20070264888A1 (en) * 2005-12-30 2007-11-15 General Electric Company Flame retardant flexible thermoplastic composition, method of making, and articles thereof
US20080193755A1 (en) * 2007-02-09 2008-08-14 Olivier Guise Extrusion die, methods of coating a wire core, and a coated wire by the extrusion die and methods
US20080248278A1 (en) * 2007-04-02 2008-10-09 General Electric Company Fiber reinforced thermoplastic sheets with surface coverings and methods of making
US20080289850A1 (en) * 2004-12-17 2008-11-27 General Electric Company Electrical Wire and Method of Making an Electrical Wire
US20100012373A1 (en) * 2008-07-16 2010-01-21 Sabic Innovative Plastics, Ip B.V. Poly(arylene ether) composition and a covered conductor with thin wall and small size conductor
EP2169007A1 (en) * 2008-09-30 2010-03-31 Sabic Innovative Plastics IP B.V. Method for preparing a poly(arylene ether) composition with improved melt flow
US20100122845A1 (en) * 2008-11-19 2010-05-20 Sabic Innovative Plastics, Ip B.V. Poly(arylene ether) composition and a covered conductor with flexible covering wall and large size conductor
US7964675B2 (en) 2004-04-08 2011-06-21 Sabic Innovative Plastics Ip B.V. Recycled thermoplastic compositions
US8530552B1 (en) 2012-04-18 2013-09-10 Sabic Innovative Plastics Ip B.V. Poly(phenylene ether) composition, article, and method
US8722789B2 (en) 2011-08-18 2014-05-13 Sabic Innovative Plastics Ip B.V. Poly(arylene ether) composition, method, and article

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Cited By (81)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0326895A3 (en) * 1988-02-03 1990-07-25 General Electric Company Compatibilized thermoplastic blends of polyphenylene ether and polyolefin
EP0326895A2 (en) * 1988-02-03 1989-08-09 General Electric Company Compatibilized thermoplastic blends of polyphenylene ether and polyolefin
EP0362660A2 (en) * 1988-10-06 1990-04-11 General Electric Company Improved polyphenylene ether resin compositions which are highly resistant to delamination
JPH02169665A (en) * 1988-10-06 1990-06-29 General Electric Co <Ge> Improved polyphenylene ether resin composition with high resistance to delamination
EP0362660A3 (en) * 1988-10-06 1990-11-28 General Electric Company Improved polyphenylene ether resin compositions which are highly resistant to delamination
EP0413972A2 (en) * 1989-08-18 1991-02-27 General Electric Company Improved thermoplastic compositions which contain polyolefins and polyphenylene ethers, and articles made therefrom
EP0413972A3 (en) * 1989-08-18 1991-05-08 General Electric Company Improved thermoplastic compositions which contain polyolefins and polyphenylene ethers, and articles made therefrom
US5296540A (en) * 1989-10-06 1994-03-22 Asahi Kasei Kogyo Kabushiki Kaisha Shaped resin article comprising polyphenylene ether
US5389320A (en) * 1991-10-28 1995-02-14 General Electric Company Method of making expandable polyphenylene ether and polyolefin blend
US5506276A (en) * 1991-10-28 1996-04-09 General Electric Company Expandable polyphenylene ether and polyolefin blend and process of making same
US5461096A (en) * 1991-12-31 1995-10-24 General Electric Company Polyphenylene ether resin-containing compositions containing high molecular weight polyethylene resin
US6544540B2 (en) 1998-07-29 2003-04-08 Syngenta Limited Base-triggered release microcapsules
US20050004281A1 (en) * 1998-10-07 2005-01-06 Adeyinka Adedeji High performance plastic pallets
US6784234B2 (en) 1998-10-07 2004-08-31 General Electric Company High performance plastic pallets
US7273014B2 (en) 1998-10-07 2007-09-25 General Electric Company High performance plastic pallets
US6113822A (en) * 1998-12-23 2000-09-05 General Electric Company Polyolefins as nucleating agent for foamed engineering polymers
US7056973B2 (en) 2000-04-12 2006-06-06 General Electric High flow polyphenylene ether formulations
US6576700B2 (en) 2000-04-12 2003-06-10 General Electric Company High flow polyphenylene ether formulations
US20030176543A1 (en) * 2000-04-12 2003-09-18 Nirajkumar Patel High flow polyphenylene ether formulations
US6809159B2 (en) 2000-04-13 2004-10-26 General Electric Company High flow polyphenylene ether formulations with dendritic polymers
US6414084B1 (en) 2000-04-13 2002-07-02 General Electric Company High flow polyphenylene ether formulations with dendritic polymers
US6927277B2 (en) 2000-05-04 2005-08-09 General Electric Company Method for isolating polymer resin from solution slurries
US6316592B1 (en) 2000-05-04 2001-11-13 General Electric Company Method for isolating polymer resin from solution slurries
US6608166B2 (en) 2001-08-30 2003-08-19 General Electric Company Three-dimensional copolymers of polyphenylene ether resinsand sytrenic resins
US6620885B2 (en) 2001-08-30 2003-09-16 General Electric Company Copolymers of functionalized polyphenylene ether resins and blends thereof
US6794450B2 (en) 2002-03-06 2004-09-21 General Electric Company High flow compositions of compatibilized poly(arylene ether) polyamide blends
US20040059042A1 (en) * 2002-09-20 2004-03-25 Hartle Thomas J. Underhood components
US20040102551A1 (en) * 2002-11-14 2004-05-27 Sho Sato Resin composition for wire and cable covering material
US7524894B2 (en) * 2002-11-14 2009-04-28 Sabic Innovative Plastics Ip B.V. Resin composition for wire and cable covering material
WO2004052992A1 (en) * 2002-12-10 2004-06-24 General Electric Company Polyphenylene ether compositions with improved die lip buidup performance
US6875387B2 (en) 2002-12-10 2005-04-05 General Electric Polyphenylene ether compositions with improved die lip buildup performance
US7253227B2 (en) 2002-12-19 2007-08-07 General Electric Company Poly(arylene ether) composition useful in blow molding
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